Design Of Rapidly Assembled Helipad And Dynamic Load Analysis Of Helicopter Landing

Helicopters,as effective technical equipment for rescue and disaster relief,have occupied a pivotal position in the national aviation emergency rescue system.However,the intricate geological environment has limited the take-off and landing conditions of the helicopter to a great extent,and has hindered the effective implementation of emergency rescue.The tiled helipad is an auxiliary equipment for emergency rescue to solve this problem,but the research and design of related products in China has been scarce.Designing a mobile helipad with rapid assembly and strong environmental adaptability is an urgent goal in the construction of Chinese aviation emergency rescue system.According to investigations and research,the tenon-and-mortise splicing scheme with rapid construction and reliable connection has been innovatively designed in this treatise.And by applying the topology and morphology joint optimization method,a lightweight deck model was obtained in Opti Struct,and the design of rapidly assembled helipad has been completed.So that the research gap of aviation emergency equipment has been made up.Previous landing research focused on the dynamic response characteristics of the landing gear and fuselage.It was implemented using virtual prototype technology,which could not complete the simulation of the ground environment and equipment.However,the speed,contact force,stress and strain and other dynamic responses of rapidly assembled helipad and soil can be obtained by nonlinear explicit dynamic simulation,which makes the interaction between landing gear and helipad more realistic during landing.The foregone research on landing conditions focused on fuselage loads and landing attitudes,which neglected ground conditions,but the landing position and geological conditions have a greater impact on the rapidly assembled helipad.Firstly,the LS-Dyna explicit solution program was used to obtain the dynamic load analysis results in this treatise,which confirmed that the quick paving ramp has the ability to support the fuselage load and adapt to the ground environment.Secondly,the response surface optimization of the deck was implemented by ANSYS to improve the overall stiffness of the helipad.Finally,a prototype of the rapidly assembled helipad was made,and a heavy object impact test was performed to verify the reliability of the test and landing simulation analysis.